TABLE 4

Yearly Trends for Serotype of Invasive Pneumococcal Isolates and Number of PCV7 Doses Preceding the Infection for Children at 8 Children's Hospitals: 2003–2008

Doses200320042005200620072008
19AOther19AOther19AOther19AOther19AOther19AOther
0127114541962193711331345
10124811376912621
2310711812710136610
37815141611201920212413
417351013261630243123
P.06a.004.001.008.004<.001
  • a χ2 for trend for each year. Data for PCV7 doses were available for 82%, 89%, 93%, 89%, 86%, and 92% of the cases for the years 2003, 2004, 2005, 2006, 2007, and 2008, respectively. If the number of PCV7 doses was unknown for a child, the case was not included in this analysis.